I need help with a fight with ex-bestfriends?

im 15 a sophmore and i rly need advisee fastt- i dropped my group of friends(3 girls) in a nasty fight 5 months ago and started over with a new friends ..but this whole time they have been making rumors up haring me online and other stuff when they see me seperate like by themselves they dont do anything, but when theyre in a group they attack me..it just got worse friday i took the bus home and they took the bus with me and they were throwing **** at me nd my friend threatning us to fight... nd tomorrow i have to see them in school and if i tell head ppl theyll jump me ..they know where i live but if i dont theyll keep going ..i need advise im panikingg